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Re: kern/45718: processes sometimes get stuck and spin in vm_map
The following reply was made to PR kern/45718; it has been noted by GNATS.
From: David Holland <dholland-bugs%netbsd.org@localhost>
Subject: Re: kern/45718: processes sometimes get stuck and spin in vm_map
Date: Sun, 2 Sep 2012 03:45:14 +0000
On Sun, Sep 02, 2012 at 12:50:04AM +0000, Chuck Silvers wrote:
> On Sat, Sep 01, 2012 at 07:20:05PM +0000, Jonathan A. Kollasch wrote:
> > I've been seeing the hangs of the exec_pool_alloc() variety in 6.0RC1 on
> > i386. Using dd if=/dev/zero of=/dev/null count=1 bs=1G (machine has
> > about 2G of RAM, sometimes needs to be more than 1G though) tends to
> > unwedge everything that gets stuck in vm_map wait channel here.
> this sounds like KVA exhaustion. this was a problem on i386 some years ago
> and I don't remember whether it was ever really fixed. I vaguely recall
> there was a particular PR that was the main means of tracking that issue
> but I can't find it now.
Do you remember anything else about that PR? I can't find it from
obvious keywords. Is it likely to have been closed?
David A. Holland
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